Audio 2G
The Reference 10 arrives equipped and set at the factory with a Pick It Pro Balanced cartridge, a “special” MM. In fact, even the top of the Debut includes the balanced connection with the “B” phono preamplifiers that Pro-Ject introduced a few years ago. These units have, in addition to the classic unbalanced inputs in which the ground is referenced to the negative of the RCA pins, additional inputs configured with the ground separated so that, as is the case with balanced connections used in professional audio, any common-mode noise is cancelled out. The Debut Reference 10 has a five-pin mini XLR connector for this type of interfacing.
With this interfacing Pro-Ject initially recommended only the use of cartridges. MMs in fact because of their high impedance generally have an internal shielding connected to a pin (usually the green one which is related to the negative of the right channel). Using balanced phono preamplifiers there would be no ground on that pin and consequently no protection against noise. In practice a normal MM could easily be noisy. Pro-Ject has thought of overcoming the obstacle by making in collaboration with Ortofon the Pick It Pro Balanced, a lower inductance moving magnet that therefore does not need the aforementioned internal shielding.
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